I would just state that the government has said that this process has to lead to a halving of global emissions by 2050 as a long-term goal, which should guide the whole negotiation. Then, as a mid-term goal, Canada has committed to a national policy, a national objective, of a 20% reduction in emissions—actual reduction in emissions—by 2020, comprising a number of efforts, including the regulatory package, efforts by provinces and so on, and the negotiating process will itself address what should be medium-term goals in a new protocol. We will see the result of the negotiations.
In its own regulatory plan, the government has indicated periodic stages of revision, examination, and review of targets. Over the next two years we and other negotiators, other countries, will need to come to grips with what those medium-term objectives should be. But the government's policy is that there should be medium-term commitments by all countries, in a binding mechanism, en route to a global target in 2050.